The John Dubas Collection consists of 24 boxes of photographs and manuscript materials related to Baltimore photographer John Dubas, including more than 3600 photographic prints, film negatives and glass negatives taken by Dubas between 1900 and 1971, as well as correspondence, ledger books, and log books. There are also newspaper clippings.

This collection contains photographs made or collected by Frederick W. Mueller, including family and unidentified portraits of men, women and children. Many panoramic photographs also depict Baltimore, Maryland and the vicinity.

This scrapbook contains various correspondence, newspaper clippings, and ephemera relating to the Society of the War of 1812 in Maryland's events, members, and functions, especially memorials and celebrations honoring battles fought in Maryland.